From the press release provided by Universal yesterday, it seems that The Gunman, featuring Sean Penn, Idris Elba, Ray Winstone, Mark Rylance and Javier Bardem, will be presented with a Dolby Atmos track on Blu-ray.
Similar to John Wick, this would be exclusive to the Blu-ray as the movie was not presented with a Dolby Atmos soundtrack in theater. It seems that Universal is strongly pushing for the format now.
As always, the movie details have been added to the list of Dolby Atmos Blu-rays.